Flat Roof Lead Flashing Details

Open valleys have metal flashing to protect this critical area of the roof.

Flat roof lead flashing details.

Roll detail at drips and abutments 41 flat roof roll and drip intersections 42 pitched roof joints and fixings 43 pitched roof intersection with valley 44. For flat roofs the lead which pays on the flat roof should be at least 200mm. However it is important to follow the basic principles of sizing and fixings as indicated in the rolled lead sheet manual to reduce the effects of fatigue cracking or creep. Horizontal flashings should provide weathering to a minimum of 75mm above the intersection with the roof.

Lead sheet is a soft and malleable metal which means it s an excellent roofing material because it can be formed and shaped to suit any detail. The extra kick at the bottom of the face directs run off away from the structure. Clip strength is increased the closer the clip is fixed to the free edge of the lead sheet or flashing. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

Lead flashing needs to be a minimum of 75mm up the wall for a standard 30 degree lean to roof against a brick wall the lead on the roof should be minimum 150mm. The standing seams are laid flat 8 from the vertical wall folded 3 4 and secured with copper cleats spaced 12 o c. Bs en12588 replaced bs1178 in august 1999. Calder lead sheet and flashing conforms to the new european standard.

Apron flashings if you are new to roofing or fitting roof flashings this really is a bread and butter place to start master this and the slightly more difficult flashings like step flashings will seem a lot easier. Where a flat or pitched roof over an enclosed area abuts a wall or a balcony abuts a wall cavity trays should be linked to the flashing to prevent water penetrating into an enclosed area. Our basic fitting guides are designed to assist installing rolled lead sheet in a range of roofing applications including flashings valleys gutters and flat roofing. Important 4 this booklet is a guide to the correct detailing and fixing of lead sheet flashings weatherings and gutter linings.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Copper locking strips of the same weight as the flashing are soldered to the pans between seams at least 6 from the wall and engage the base. Gibraltar roof edge flashing can be used with asphalt shingles or metal roofing panels. Flat roof coverings 22 window flashings 23 contents note.

Where a pitched roof abuts the wall at an angle. The detail shows the method of flashing the head of a standing seam shed roof. This roof edge flashing provides protection from water damage along the eaves and rake of a roof. The following information conforms.

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